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High Speed Steel Ball Burs Size 19 (4.7mm) Round
High Speed Steel Ball Burs Size 19 (4.7mm) Round
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Spanish Name: FRESAS DE ALTA VELOCIDAD, TAMAÑO 19 Redondo


Product Code: B260-19
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Description Technical Specs
 

The High Speed Steel Ball Burs Size 19 (4.7mm) Round is a high-precision cutting tool designed for professional jewelers requiring clean, powerful, and controlled metal removal for larger cavity shaping and detailed jewelry work. Crafted from premium high-speed steel (HSS), this heavy-duty ball bur offers exceptional durability, superior hardness, and long-lasting cutting performance even under continuous operation.

With a 4.7mm spherical head, this bur is engineered for tasks that require deeper, wider, and smoother cuts. It is ideal for large cavity formation, hollowing out metal, shaping bezels, refining broad stone-setting seats, carving domed surfaces, and smoothing interior contours. Its perfect ball geometry ensures effortless cutting with consistent rotational stability and minimized vibration, offering clean, accurate results across all jewelry metals.

The bur features precision-engineered spiral flutes that provide efficient chip evacuation, preventing clogging and heat buildup. This guarantees smoother cutting, longer tool life, and reduced risk of metal discoloration due to overheating. The standard 3/32" (2.35mm) shank ensures full compatibility with professional rotary tools, flex shafts, and micromotors widely used in jewelry workshops.

Designed to withstand heavy detailing and metal removal on gold, silver, platinum, brass, copper, and other alloys, this HSS bur maintains sharpness significantly longer than standard carbon steel burs. Its robust construction offers consistent performance, reduced tool changes, and improved productivity for professional bench jewelers, wax model makers, and stone setters.

The High Speed Steel Ball Burs Size 19 (4.7mm) Round is essential for craftsmen who demand precision, power, and long-term reliability in their jewelry production and metalworking applications.

Key Benefits

  • Large 4.7mm round head for powerful, smooth metal shaping

  • High-speed steel construction ensures exceptional durability

  • Efficient cutting action with reduced heat buildup

  • Ideal for large stone seats, carving, and extensive shaping

  • Professional-grade performance for long-term use
Features

  • 4.7mm precision round head designed for deep cuts, shaping, and large stone-seat preparation.

  • High-speed steel build delivers long-lasting sharpness and superior strength.

  • Spiral-cut flutes allow smooth metal removal with minimal heat and vibration.

  • Standard 3/32" shank fits all professional jewelry handpieces and flex shafts.

  • Perfect for heavy-duty carving, hollowing, smoothing, and bezel shaping.

  • Consistent, clean cutting performance across gold, silver, platinum, and other alloys.

High Speed Bur Size Convertion Chart
SIZE MM IN/PUL. SIZE MM IN/PUL.
1 1.05 0.035 18 4.5 0.177
2 1.2 0.043 19 4.7 0.185
3 1.35 0.051 20 5 0.197
4 1.5 0.059 22 5.2 0.204
5 1.7 0.067 23 5.4 0.212
6 1.9 0.075 24 5.6 0.22
7 2.1 0.083 25 5.9 0.232
8 2.3 0.09 26 6.3 0.248
9 2.5 0.098 27 6.7 0.263
10 2.7 0.106 28 7.2 0.283
11 2.9 0.114 29 7.6 0.299
12 3.1 0.122 30 8 0.314
13 3.3 0.13 31 8.9 0.35
14 3.5 0.138 32 9.6 0.377
15 3.8 0.149 33 10.4 0.409
16 4 0.157 34 11 0.437
17 4.3 0.169

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